Home Loan Default status removal on Transunion

I currently have a home loan with FNB, and granted it was on arrears in the year 2024. I settle the arrears amount in October 2024. I was flagged as a default payer on my Transunion credit profile in August 2024, despite having made payment arrangements. After settling my arrears i requested FNB to update my ITC on Transunion, that never happened. I then requested a letter stating that my default amount has been settled, which was sent to me by FNB on 13.03.2025. I forwarded this very letter to Transunion which in turn told me that they called FNB and FNB says my default has not been paid. how is that possible when they themselves sent me a letter to this effect? I am at my wits end trying to clear my default status on my credit record with Transunion. Home Loan Account No. ***